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(loop (car tal)(cdr tal)(+ rownum 1) 1))))))
(if (> max-row 0)
(begin
;; we are going to speculatively clear rows until we find a row that is already cleared
(let loop ((rownum (+ max-row 1))
(colnum 0)
(deleted #f))
;; (debug:print-info 0 #f "cleaning " rownum ":" colnum)
;; (debug:print-info 0 *default-log-port* "cleaning " rownum ":" colnum)
(let* ((next-row (if (eq? colnum max-col) (+ rownum 1) rownum))
(next-col (if (eq? colnum max-col) 1 (+ colnum 1)))
(mtrx-rc (conc rownum ":" colnum))
(curr-val (iup:attribute steps-matrix mtrx-rc)))
;; (debug:print-info 0 #f "cleaning " rownum ":" colnum " currval= " curr-val)
;; (debug:print-info 0 *default-log-port* "cleaning " rownum ":" colnum " currval= " curr-val)
(if (and (string? curr-val)
(not (equal? curr-val "")))
(begin
(iup:attribute-set! steps-matrix mtrx-rc "")
(loop next-row next-col #t))
(if (eq? colnum max-col) ;; not done, didn't get a full blank row
(if deleted (loop next-row next-col #f)) ;; exit on this not met
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